<!--考生答题界面-->
<template>
  <div id="answer">
    <!--顶部信息栏-->
    <div class="top">
      <ul class="item">
        <li>
          <!--通过改变slider_flag的值，控制题目编号区是否显示-->
          <i class="iconfont icon-menufold icon20" ref="toggle" @click="slider_flag = !slider_flag"></i>
        </li>
        <li>{{examData.type}}-{{examData.source}}</li>
        <li @click="flag = !flag">
          <i class="iconfont icon-user icon20"></i>
          <div class="msg" v-if="flag" @click="flag = !flag">
            <p>姓名：{{userInfo.name}}</p>
            <p>准考证号: {{userInfo.id}}</p>
          </div>
        </li>
        <li><i class="iconfont icon-arrLeft icon20"></i></li>
      </ul>
    </div>
    <div class="flexarea">
      <!--左边题目编号区-->
      <transition name="slider-fade">
        <div class="left" v-if="slider_flag">
          <ul class="l-top">
            <li>
              <a href="javascript:;"></a>
              <span>当前</span>
            </li>
            <li>
              <a href="javascript:;"></a>
              <span>未答</span>
            </li>
            <li>
              <a href="javascript:;"></a>
              <span>已答</span>
            </li>
            <li>
              <a href="javascript:;"></a>
              <span>标记</span>
            </li>
          </ul>

          <div class="l-bottom">
            <div class="item">
              <p>选择题部分</p>
              <ul>
                <li v-for="(list, index1) in topic[1]" :key="index1">
                  <a href="javascript:;"
                     @click="change(index1)"
                     :class="{'border': index == index1 && currentType == 1,'bg': bg_flag && topic[1][index1].isClick == true}">
                    <span :class="{'mark': topic[1][index1].isMark == true}"></span>
                    {{index1+1}}
                  </a>
                </li>
              </ul>
            </div>

            <div class="item">
              <p>填空题部分</p>
              <ul>
                <li v-for="(list, index2) in topic[2]" :key="index2">
                  <a href="javascript:;" @click="fill(index2)"
                     :class="{'border': index == index2 && currentType == 2,'bg': fillAnswer[index2][3] == true}"><span
                    :class="{'mark': topic[2][index2].isMark == true}"></span>{{topicCount[0]+index2+1}}</a>
                </li>
              </ul>
            </div>

            <div class="item">
              <p>判断题部分</p>
              <ul>
                <li v-for="(list, index3) in topic[3]" :key="index3">
                  <a href="javascript:;" @click="judge(index3)"
                     :class="{'border': index == index3 && currentType == 3,'bg': bg_flag && topic[3][index3].isClick == true}"><span
                    :class="{'mark': topic[3][index3].isMark == true}"></span>{{topicCount[0]+topicCount[1]+index3+1}}</a>
                </li>
              </ul>
            </div>
            <div class="final" @click="commit()">结束考试</div>
          </div>
        </div>
      </transition>

      <!--右边选择答题区-->
      <transition name="slider-fade">
        <div class="right">

          <div class="title">
            <p>{{title}}</p>
            <i class="iconfont icon-right auto-right"></i>
            <span>全卷共{{topicCount[0] + topicCount[1] + topicCount[2]}}题
              <i class="iconfont icon-time"></i>倒计时：<b>{{time}}</b>分钟
            </span>
          </div>

          <div class="content">
            <p class="topic">
              <!--number：题号-->
              <span class="number">{{number}}</span>
              <!--展示题目-->
              {{showQuestion}}
            </p>
            <div v-if="currentType == 1">
              <el-radio-group v-model="radio[index]" @change="getChangeLabel">
                <el-radio :label="1">{{showAnswer.answerA}}</el-radio>
                <el-radio :label="2">{{showAnswer.answerB}}</el-radio>
                <el-radio :label="3">{{showAnswer.answerC}}</el-radio>
                <el-radio :label="4">{{showAnswer.answerD}}</el-radio>
              </el-radio-group>

              <div class="analysis" v-if="isPractice">
                <ul>
                  <li>
                    <el-tag type="success">正确姿势：</el-tag>
                    <span class="right">{{reduceAnswer.rightAnswer}}</span></li>
                  <li>
                    <el-tag>题目解析：</el-tag>
                  </li>
                  <li>{{reduceAnswer.analysis == null ? '暂无解析': reduceAnswer.analysis}}</li>
                </ul>
              </div>
            </div>

            <div class="fill" v-if="currentType == 2">
              <div v-for="(item,currentIndex) in part" :key="currentIndex">
                <el-input placeholder="请填在此处"
                          v-model="fillAnswer[index][currentIndex]"
                          clearable
                          @blur="fillBG">
                </el-input>
              </div>
              <div class="analysis" v-if="isPractice">
                <ul>
                  <li>
                    <el-tag type="success">正确姿势：</el-tag>
                    <span class="right">{{topic[2][index].answer}}</span></li>
                  <li>
                    <el-tag>题目解析：</el-tag>
                  </li>
                  <li>{{topic[2][index].analysis == null ? '暂无解析': topic[2][index].analysis}}</li>
                </ul>
              </div>
            </div>

            <div class="judge" v-if="currentType == 3">
              <el-radio-group v-model="judgeAnswer[index]" @change="getJudgeLabel" v-if="currentType == 3">
                <el-radio :label="1">正确</el-radio>
                <el-radio :label="2">错误</el-radio>
              </el-radio-group>
              <div class="analysis" v-if="isPractice">
                <ul>
                  <li>
                    <el-tag type="success">正确姿势：</el-tag>
                    <span class="right">{{topic[3][index].answer}}</span></li>
                  <li>
                    <el-tag>题目解析：</el-tag>
                  </li>
                  <li>{{topic[3][index].analysis == null ? '暂无解析': topic[3][index].analysis}}</li>
                </ul>
              </div>
            </div>
          </div>
          <div class="operation">
            <ul class="end">
              <li @click="previous()"><i class="iconfont icon-previous"></i><span>上一题</span></li>
              <li @click="mark()"><i class="iconfont icon-mark-o"></i><span>标记</span></li>
              <li @click="next()"><span>下一题</span><i class="iconfont icon-next"></i></li>
            </ul>
          </div>
        </div>
      </transition>
    </div>
  </div>
</template>

<script>
  import store from '@/vuex/store'
  import {mapState} from 'vuex'

  export default {
    store,
    data() {
      return {
        startTime: null, //考试开始时间
        endTime: null, //考试结束时间
        time: null, //考试持续时间
        reduceAnswer: [],  //vue官方不支持3层以上数据嵌套,如嵌套则会数据渲染出现问题,此变量直接接收3层嵌套时的数据。
        answerScore: 0, //答题总分数
        bg_flag: false, //已答标识符,已答改变背景色
        isFillClick: false, //选择题是否点击标识符
        slider_flag: true, //左侧显示隐藏标识符
        flag: false, //个人信息显示隐藏标识符
        currentType: 1, //当前题型类型  1--选择题  2--填空题  3--判断题
        radio: [], //保存考生所有选择题的选项
        title: "请选择正确的选项",
        index: 0, //全局index
        userInfo: { //用户信息
          name: null,
          id: null
        },
        topicCount: [],//每种类型题目的总数
        score: [],  //每种类型分数的总数
        examData: { //考试信息
          // source: null,
          // totalScore: null,
        },
        topic: {  //试卷信息
        },
        showQuestion: [], //当前显示题目信息
        showAnswer: {}, //当前题目对应的答案选项
        number: 1, //题号
        part: null, //填空题的空格数量
        fillAnswer: [[]], //二维数组保存所有填空题答案
        judgeAnswer: [], //保存所有判断题答案
        topic1Answer: [], //学生选择题作答编号,
        rightAnswer: ''
      }
    },
    created() {
      this.getCookies()
      this.getExamData()
      this.showTime()
    },
    methods: {
      //日期格式化
      getTime(date) {
        let year = date.getFullYear()
        let month = date.getMonth() + 1 < 10 ? "0" + (date.getMonth() + 1) : date.getMonth() + 1;
        let day = date.getDate() < 10 ? "0" + date.getDate() : date.getDate();
        let hours = date.getHours() < 10 ? "0" + date.getHours() : date.getHours();
        let minutes = date.getMinutes() < 10 ? "0" + date.getMinutes() : date.getMinutes();
        let seconds = date.getSeconds() < 10 ? "0" + date.getSeconds() : date.getSeconds();
        // 拼接
        return year + "-" + month + "-" + day + " " + hours + ":" + minutes + ":" + seconds;
      },
      //获取cookie
      getCookies() {
        this.userInfo.name = this.$cookies.get("cname")
        this.userInfo.id = this.$cookies.get("cid")
      },
      calcuScore() { //计算答题分数

      },
      //获取当前试卷所有信息
      getExamData() {
        let date = new Date()
        this.startTime = this.getTime(date)//当前时间为考试开始时间
        let examCode = this.$route.query.examCode //获取路由传递过来的试卷编号
        this.$axios(`/api/exam/${examCode}`).then(res => {  //通过examCode请求试卷详细信息
          this.examData = {...res.data.data} //获取考试详情
          this.index = 0
          this.time = this.examData.totalTime //获取分钟数
          let paperId = this.examData.paperId
          this.$axios(`/api/paper/${paperId}`).then(res => {  //通过paperId获取试题题目信息
            //存放整张试题信息
            this.topic = {...res.data}
            let reduceAnswer = this.topic[1][this.index]
            //当前第一个题目
            this.reduceAnswer = reduceAnswer
            //试卷对象转成数组
            let keys = Object.keys(this.topic)
            keys.forEach(e => {
              let data = this.topic[e]
              //将每种类型题目的总数存放在topicCount
              this.topicCount.push(data.length)
              let currentScore = 0
              for (let i = 0; i < data.length; i++) { //循环每种题型,计算出总分
                currentScore += data[i].score
              }
              this.score.push(currentScore) //把每种题型总分存入score
            })
            //this.topicCount[1]填空题的数量
            let len = this.topicCount[1]
            let father = []
            for (let i = 0; i < len; i++) { //根据填空题数量创建二维空数组存放每道题答案
              let children = [null, null, null, null]
              father.push(children)
            }
            this.fillAnswer = father
            //选择题题目
            let dataInit = this.topic[1]
            this.number = 1
            //展示题
            this.showQuestion = dataInit[0].question
            //存放整个题目对象
            this.showAnswer = dataInit[0]
          })
        })
      },
      //选择题
      change(index) {
        this.index = index
        let reduceAnswer = this.topic[1][this.index]
        this.reduceAnswer = reduceAnswer
        this.isFillClick = true
        this.currentType = 1
        let len = this.topic[1].length
        if (this.index < len) {
          if (this.index <= 0) {
            this.index = 0
          }
          console.log(`总长度${len}`)
          console.log(`当前index:${index}`)
          this.title = "请选择正确的选项"
          let Data = this.topic[1]
          // console.log(Data)
          this.showQuestion = Data[this.index].question //获取题目信息
          this.showAnswer = Data[this.index]
          this.number = this.index + 1
        } else if (this.index >= len) {
          this.index = 0
          this.fill(this.index)
        }
      },
      //填空题已答题目 如果已答该题目,设置第四个元素为true为标识符
      fillBG() {
        if (this.fillAnswer[this.index][0] != null) {
          this.fillAnswer[this.index][3] = true
        }
      },
      //填空题
      fill(index) {
        let len = this.topic[2].length
        this.currentType = 2
        this.index = index
        if (index < len) {
          if (index < 0) {
            index = this.topic[1].length - 1
            this.change(index)
          } else {
            console.log(`总长度${len}`)
            console.log(`当前index:${index}`)
            this.title = "请在横线处填写答案"
            let Data = this.topic[2]
            console.log(Data)
            this.showQuestion = Data[index].question //获取题目信息
            let part = this.showQuestion.split("()").length - 1 //根据题目中括号的数量确定填空横线数量
            this.part = part
            this.number = this.topicCount[0] + index + 1
          }
        } else if (index >= len) {
          this.index = 0
          this.judge(this.index)
        }
      },
      //判断题
      judge(index) {
        let len = this.topic[3].length
        this.currentType = 3
        this.index = index
        if (this.index < len) {
          if (this.index < 0) {
            this.index = this.topic[2].length - 1
            this.fill(this.index)
          } else {
            console.log(`总长度${len}`)
            console.log(`当前index:${this.index}`)
            this.title = "请作出正确判断"
            let Data = this.topic[3]
            console.log(Data)
            this.showQuestion = Data[index].question //获取题目信息
            this.number = this.topicCount[0] + this.topicCount[1] + index + 1
          }
        } else if (this.index >= len) {
          this.index = 0
          this.change(this.index)
        }
      },
      getChangeLabel(val) { //获取选择题作答选项
        this.radio[this.index] = val //当前选择的序号
        if (val) {
          let data = this.topic[1]
          this.bg_flag = true
          data[this.index]["isClick"] = true
        }
        /* 保存学生答题选项 */
        this.topic1Answer[this.index] = val
      },
      //获取判断题作答选项
      getJudgeLabel(val) {
        this.judgeAnswer[this.index] = val
        if (val) {
          let data = this.topic[3]
          this.bg_flag = true
          data[this.index]["isClick"] = true
        }
      },
      //上一题
      previous() {
        this.index--
        switch (this.currentType) {
          case 1:
            this.change(this.index)
            break
          case 2:
            this.fill(this.index)
            break
          case 3:
            this.judge(this.index)
            break
        }
      },
      //下一题
      next() {
        this.index++
        switch (this.currentType) {
          case 1:
            this.change(this.index)
            break
          case 2:
            this.fill(this.index)
            break
          case 3:
            this.judge(this.index)
            break
        }
      },
      //标记功能
      mark() {
        switch (this.currentType) {
          case 1:
            this.topic[1][this.index]["isMark"] = true //选择题标记
            break
          case 2:
            this.topic[2][this.index]["isMark"] = true //填空题标记
            break
          case 3:
            this.topic[3][this.index]["isMark"] = true //判断题标记
        }
      },
      //答案提交计算分数
      commit() {
        /* 计算选择题总分 */
        let topic1Answer = this.topic1Answer
        let finalScore = 0
        topic1Answer.forEach((element, index) => { //循环每道选择题根据选项计算分数
          let right = null
          if (element != null) {
            switch (element) { //选项1,2,3,4 转换为 "A","B","C","D"
              case 1:
                right = "A"
                break
              case 2:
                right = "B"
                break
              case 3:
                right = "C"
                break
              case 4:
                right = "D"
            }
            if (right == this.topic[1][index].rightAnswer) { // 当前选项与正确答案对比
              finalScore += this.topic[1][index].score // 计算总分数
            }
            console.log(right, this.topic[1][index].rightAnswer)
          }
          // console.log(topic1Answer)
        })
        /**计算填空题总分 */
          // console.log(`this.fillAnswer${this.fillAnswer}`)
          // console.log(this.topic[2][this.index])
        let fillAnswer = this.fillAnswer
        fillAnswer.forEach((element, index) => { //此处index和 this.index数据不一致，注意
          element.forEach((inner) => {
            console.log(inner)
            if (this.topic[2][index].answer.includes(inner)) { //判断填空答案是否与数据库一致
              console.log("正确")
              finalScore += this.topic[2][this.index].score
            }
          })
        });
        /** 计算判断题总分 */
        let topic3Answer = this.judgeAnswer
        topic3Answer.forEach((element, index) => {
          let right = null
          switch (element) {
            case 1:
              right = "T"
              break
            case 2:
              right = "F"
          }
          if (right == this.topic[3][index].answer) { // 当前选项与正确答案对比
            finalScore += this.topic[3][index].score // 计算总分数
          }
        })
        console.log(`目前总分${finalScore}`)
        if (this.time != 0) {
          this.$confirm("考试结束时间未到,是否提前交卷", "友情提示", {
            confirmButtonText: '立即交卷',
            cancelButtonText: '再检查一下',
            type: 'warning'
          }).then(() => {
            console.log("交卷")
            let date = new Date()
            this.endTime = this.getTime(date)
            let answerDate = this.endTime.substr(0, 10)
            //提交成绩信息
            this.$axios({
              url: '/api/score',
              method: 'post',
              data: {
                examCode: this.examData.examCode, //考试编号
                studentId: this.userInfo.id, //学号
                subject: this.examData.source, //课程名称
                etScore: finalScore, //答题成绩
                answerDate: answerDate, //答题日期
              }
            }).then(res => {
              if (res.data.code == 200) {
                this.$router.push({
                  path: '/studentScore', query: {
                    score: finalScore,
                    startTime: this.startTime,
                    endTime: this.endTime,
                    examData: this.examData
                  }
                })
              }
            })
          }).catch(() => {
            console.log("继续答题")
          })
        } else if (this.time == 0) {
          console.log("交卷")
          let date = new Date()
          this.endTime = this.getTime(date)
          let answerDate = this.endTime.substr(0, 10)
          //提交成绩信息
          this.$axios({
            url: '/api/score',
            method: 'post',
            data: {
              examCode: this.examData.examCode, //考试编号
              studentId: this.userInfo.id, //学号
              subject: this.examData.source, //课程名称
              etScore: finalScore, //答题成绩
              answerDate: answerDate, //答题日期
            }
          }).then(res => {
            if (res.data.code == 200) {
              this.$router.push({
                path: '/studentScore', query: {
                  score: finalScore,
                  startTime: this.startTime,
                  endTime: this.endTime,
                  examData: this.examData
                }
              })
            }
          })
        }
      },
      //倒计时
      showTime() {
        setInterval(() => {
          this.time -= 1
          if (this.time == 10) {
            this.$message({
              showClose: true,
              type: 'error',
              message: '考生注意,考试时间还剩10分钟！！！'
            })
          }
          if (this.time == 0) {
            console.log("考试时间已到,强制交卷。")
            this.commit()
          }
        }, 1000 * 60)
      }
    },
    computed: mapState(["isPractice"])
  }
</script>

<style lang="scss">
  .iconfont.icon-time {
    color: #2776df;
    margin: 0px 6px 0px 20px;
  }

  .analysis {
    margin-top: 20px;

  .right {
    color: #2776df;
    font-size: 18px;
    border: 1px solid #2776df;
    padding: 0px 6px;
    border-radius: 4px;
    margin-left: 20px;
  }

  ul li:nth-child(2) {
    margin: 20px 0px;
  }

  ul li:nth-child(3) {
    padding: 10px;
    background-color: #d3c6c9;
    border-radius: 4px;
  }

  }
  .analysis span:nth-child(1) {
    font-size: 18px;
  }

  .mark {
    position: absolute;
    width: 4px;
    height: 4px;
    content: "";
    background-color: red;
    border-radius: 50%;
    top: 0px;
    left: 22px;
  }

  .border {
    position: relative;
    border: 1px solid #FF90AA !important;
  }

  .bg {
    background-color: #5188b8 !important;
  }

  .fill .el-input {
    display: inline-flex;
    width: 150px;
    margin-left: 20px;

  .el-input__inner {
    border: 1px solid transparent;
    border-bottom: 1px solid #eee;
    padding-left: 20px;
  }

  }
  /* slider过渡效果 */
  .slider-fade-enter-active {
    transition: all .3s ease;
  }

  .slider-fade-leave-active {
    transition: all .3s cubic-bezier(1.0, 0.5, 0.8, 1.0);
  }

  .slider-fade-enter, .slider-fade-leave-to {
    transform: translateX(-100px);
    opacity: 0;
  }

  .operation .end li:nth-child(2) {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: rgb(39, 118, 223);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    color: #fff;
  }

  .operation .end li {
    cursor: pointer;
    margin: 0 100px;
  }

  .operation {
    background-color: #fff;
    border-radius: 4px;
    padding: 10px 0px;
    margin-right: 10px;
  }

  .operation .end {
    display: flex;
    justify-content: center;
    align-items: center;
    color: rgb(39, 118, 223);
  }

  .content .number {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 20px;
    height: 20px;
    background-color: rgb(39, 118, 223);
    border-radius: 4px;
    margin-right: 4px;
  }

  .content {
    padding: 0px 20px;
  }

  .content .topic {
    padding: 20px 0px;
    padding-top: 30px;
  }

  .right .content {
    background-color: #fff;
    margin: 10px;
    margin-left: 0px;
    height: 470px;
  }

  .content .el-radio-group label {
    color: #000;
    margin: 5px 0px;
  }

  .content .el-radio-group {
    display: flex;
    flex-direction: column;
  }

  .right .title p {
    margin-left: 20px;
  }

  .flexarea {
    display: flex;
  }

  .flexarea .right {
    flex: 1;
  }

  .auto-right {
    margin-left: auto;
    color: #2776df;
    margin-right: 10px;
  }

  .right .title {
    margin-right: 10px;
    padding-right: 30px;
    display: flex;
    margin-top: 10px;
    background-color: #fff;
    height: 50px;
    line-height: 50px;
  }

  .clearfix {
    clear: both;
  }

  .l-bottom .final {
    cursor: pointer;
    display: inline-block;
    text-align: center;
    background-color: rgb(39, 118, 223);
    width: 240px;
    margin: 20px 0px 20px 10px;
    border-radius: 4px;
    height: 30px;
    line-height: 30px;
    color: #fff;
    margin-top: 22px;
  }

  #answer .left .item {
    padding: 0px;
    font-size: 16px;
  }

  .l-bottom {
    border-radius: 4px;
    background-color: #fff;
  }

  .l-bottom .item p {
    margin-bottom: 15px;
    margin-top: 10px;
    color: #000;
    margin-left: 10px;
    letter-spacing: 2px;
  }

  .l-bottom .item li {
    width: 15%;
    margin-left: 5px;
    margin-bottom: 10px;
  }

  .l-bottom .item {
    display: flex;
    flex-direction: column;
  }

  .l-bottom .item ul {
    width: 100%;
    margin-bottom: -8px;
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
  }

  .l-bottom .item ul li a {
    position: relative;
    justify-content: center;
    display: inline-flex;
    align-items: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background-color: #fff;
    border: 1px solid #eee;
    text-align: center;
    color: #000;
    font-size: 16px;
  }

  .left .l-top {
    display: flex;
    justify-content: space-around;
    padding: 16px 0px;
    border: 1px solid #eee;
    border-radius: 4px;
    margin-bottom: 10px;
    background-color: #fff;
  }

  .left {
    width: 260px;
    height: 100%;
    margin: 10px 10px 0px 10px;
  }

  .left .l-top li:nth-child(2) a {
    border: 1px solid #eee;
  }

  .left .l-top li:nth-child(3) a {
    background-color: #5188b8;
    border: none;
  }

  .left .l-top li:nth-child(4) a {
    position: relative;
    border: 1px solid #eee;
  }

  .left .l-top li:nth-child(4) a::before {
    width: 4px;
    height: 4px;
    content: " ";
    position: absolute;
    background-color: red;
    border-radius: 50%;
    top: 0px;
    left: 16px;
  }

  .left .l-top li {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
  }

  .left .l-top li a {
    display: inline-block;
    padding: 10px;
    border-radius: 50%;
    background-color: #fff;
    border: 1px solid #FF90AA;
  }

  #answer .top {
    background-color: rgb(39, 118, 223);
  }

  #answer .item {
    color: #fff;
    display: flex;
    padding: 20px;
    font-size: 20px;
  }

  #answer .top .item li:nth-child(1) {
    margin-right: 10px;
  }

  #answer .top .item li:nth-child(3) {
    position: relative;
    margin-left: auto;
  }

  #answer {
    padding-bottom: 30px;
  }

  .icon20 {
    font-size: 20px;
    font-weight: bold;
  }

  .item .msg {
    padding: 10px 15px;
    border-radius: 4px;
    top: 47px;
    right: -30px;
    color: #6c757d;
    position: absolute;
    border: 1px solid rgba(0, 0, 0, .15);
    background-color: #fff;
  }

  .item .msg p {
    font-size: 16px;
    width: 200px;
    text-align: left;
  }
</style>
